What is a common pathological lead point associated with recurrent intussusception in older children?

A common pathological lead point associated with recurrent intussusception in older children is Meckel's diverticulum. This congenital anomaly arises from an incomplete obliteration of the omphalomesenteric duct and can lead to obstruction or irritation of the bowel. In some cases, the diverticulum may contain ectopic tissue, such as gastric or pancreatic tissue, which can contribute to inflammation and subsequently lead to intussusception.

Recurrent intussusception occurs more frequently in older children compared to infants, and in these cases, a pathological lead point is often identified. Meckel's diverticulum is one of the leading causes due to its anatomical configuration and potential for causing focal irritation in the intestine.

Other conditions listed, such as pyloric stenosis, primarily affect younger infants and are more associated with gastric outlet obstruction rather than recurrent intussusception. Appendicitis, while it can cause complications like an abscess, does not serve as a typical lead point for recurrent intussusception in older children. Similarly, intestinal atresia is usually diagnosed in infancy and does not specifically relate to recurrent intussusception in older pediatric patients.